參數(shù)資料
型號: XRT83VSH316IB
廠商: EXAR CORP
元件分類: 數(shù)字傳輸電路
英文描述: 16-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
中文描述: DATACOM, PCM TRANSCEIVER, PBGA316
封裝: 21 X 21 MM, STBGA-316
文件頁數(shù): 44/96頁
文件大?。?/td> 600K
代理商: XRT83VSH316IB
XRT83VSH316
PRELIMINARY
42
16-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
REV. P1.0.3
5.2
The XRT83VSH316 has the capability of providing the necessary chip selects for multiple 16-channel LIU
devices. The LIU is responsible for selecting itself, up to 5 additional LIU devices, or all 6 devices
simultaneously for permitting access to internal registers. The state of the chip select output pins is determined
by a chip select decoder controlled by the 3 MSBs of the address bus ADDR[12:10]. Only one LIU (Master)
requires the ADDR[12:10]. The other 5 LIU devices use the 10 LSBs for the direct address bus ADDR[9:0].
Figure 27
is a simplified block diagram of connecting six 16-channel LIU devices for 84-channel applications.
Selection of the chip select outputs using ADDR[12:10] is shown in
Table 13
.
F
IGURE
27. S
IMPLIFIED
B
LOCK
D
IAGRAM
OF
AN
84-C
HANNEL
A
PPLICATION
84-Channel T1/E1 Multiplexer/Mapper Applications
T
ABLE
13: C
HIP
S
ELECT
A
SSIGNMENTS
ADDR[12:10]
A
CTIVE
C
HIP
S
ELECT
0h (000)
Current Device (Master)
1h (001)
Chip 1
2h (010)
Chip 2
3h (011)
Chip 3
4h (100)
Chip 4
5h (101)
Chip 5
6h (110)
Reserved
7h (111)
All Devices Active
Chip Address A12:10]
Address A9:0]
Data 7:0]
CS[5:1]
CS
CS
CS
CS
CS
0
1
2
3
4
5
Master
Slave
Slave
Slave
Slave
Slave
XRT83VSH316
XRT83VSH316
XRT83VSH316
XRT83VSH316
XRT83VSH316
XRT83VSH316
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